I.O.I (Hangul: 아이오아이; also known as Ideal of Idol) was a South Korean girl group formed by CJ E&M through the 2016 reality show Produce 101 on Mnet. The group is composed of eleven members chosen from a pool of 101 trainees from various entertainment companies. The final lineup consists of: Somi (JYP), Sejeong (JellyFish), Yoojung (Fantagio), Chungha (M&H), Sohye (Redline), Jieqiong (Pledis), Chaeyeon (MBK), Doyeon (Fantagio), Mina (JellyFish), Nayoung (Pledis) and Yeonjung (Starship).